... generating 2.5D PEBI grids. Effectiveness of the method to construct acute PEBI grids honoring geological objects and complex wells is demonstrated by meshing representative reservoir geometries. Numerical results are presented that verify consistency of the two-point flux on the resulting boundary-aligned...

... accurate velocity fields. To overcome the issues associated to the complex geometries and, at the same time, retaining the quality of the solutions, we present here the virtual element method to solve the Darcy problem, in mixed form, in presence of curved interfaces in two and three dimensions...

... and well index values capture the radial effects and avoid the numerical pseudo-skin typically observed with 2.5D grids. As illustrated with various cases, such approach accurately and consistently simulates wells of complex geometries for all resolutions. The outcome is a new method for generating 3D...

... of geological model permeability to gridblock scale permeability. Unstructured Gridding As we start to introduce more complex fracture geometries, the use of Cartesian grids becomes limiting. For example, we may have non-planar secondary fractures or non-vertical hydraulic fractures. While linear flow...

..., well trajectories and development options, and testing of how these might impact on reservoir behavior. We present a new reservoir modeling and simulation approach termed Rapid Reservoir Modeling (RRM) that allows such prototyping and complements existing workflows. In RRM, reservoir geometries...

.... Thus in reservoir modelling grids generated should be fault aligned. Pinch-outs Recovery: In reservoir simulation Pinch-outs are frequent, so any grid generation method employed should conform to their geometries. The unstructured grids used in reservoir modelling, commonly employ Delaunay...

... to be captured in a simulation grid in order to have effect on the simulation and to relate dynamic results back to geologic model and interpretation. In terms of grid generation this means two sets of independent / conflicting constraints on the grid geometry, since generally fault networks are unrelated...

... is not isolated, as in Eq. 1 , but depends on external factors, such as presence of nearby wells, reflected in the discrete pressure profile around the well cell. Moreover, each coefficient associated with the particular “outer cell” (i > 0) pressure captures the local geometry and rock properties...

... features associated with realistic geological features that are typically lost. The approach may also be used to capture near wellbore flow features such as coning, changes in surface geometry across multiple stochastic realizations and, in future applications, geomechanical models with fracture...

... geological structure geometry pinchout reservoir model Cartesian grid representation grid spe 163606 structural uncertainty boundary uncertainty quantification posterior credible interval structural uncertainty quantification cartesian cut cell method truth case interface method...

... for unstructured grid simulation. The paper describes a method to generate unstructured grids which conform to complex well paths in field-scale simulation. The method uses a multi-level approach to place cells optimally within the solution domain based on the "regions of interests". The wellbore geometry...

... sector model, show the suitability of cut-cell grids for simulation. scaling method Upstream Oil & Gas Artificial Intelligence polyhedra reservoir simulation spe reservoir simulation symposium Halfedge Implementation polyhedron vertex polygon geometry data structure Modeling...

... Abstract An accurate and efficient reservoir modeling process is essential for developing and producing hydrocarbon reserves, especially from unconventional resources. In this paper, we address some of the main challenges associated with modeling complex reservoir geometry and heterogeneous...

... equation simulation fractured rock geometry flow experiment relative permeability aperture fluid dynamics Introduction Oil is difficult to recover from fractured reservoirs but about 60% of the worlds remaining resources reside in such heterogeneously deformed formations 1 . The production...

... in the numerical calculation of flux and spatial error. spe 92873 flux equation upstream oil & gas streamline simulation algorithm geometry pollock trajectory convergence corner point cell discretization streamline spatial error discretization error streamtube flight calculation...

... quantification of this uncertainty. The properties along each streamline are upscaled analytically to provide effective permeability, porosity, relative permeability and geometry for that streamline. This is achieved by a new method for upscaling total mobility in 1dimension, which, combined with an existing...

... society of petroleum engineers well model dimension spe 66357 permeability multi-block grid 27-point stencil grid stencil procedure reservoir simulation geometry boundary artificial intelligence equation reservoir trajectory finite difference stencil fluid dynamics society...

... geometry the diagonal tensor assumption leads to an O(1) error in velocity field. The focus of this paper is on the development of finite volume schemes that maintain consistent full tensor flux approximations while retaining standard diagonal tensor Jacobian matrix inversion in three dimensions...

... of different volumes and shapes are associated to each fracture cell depending on the local geometry of the surrounding fractures. The matrix block geometry is determined using a rapid image processing algorithm. The great advantage of this approach is to simulate local matrix-fracture exchanges on large...

... characterization boundary production monitoring gridblock voronoi grid reservoir surveillance production control spe 37999 cartesian grid triangulation geometry equation permeability tensor triangle module interface grid The control volume finite element (CVFE) method uses triangular mesh...